Ventilation.



No. 789,627. I PATENTED MAY 9, 1905. G. L. PULLMAN.

VENTILATION.

APPLIOATION FILED JAN.19. 1901.

a "wnll III" I "Man/tom: 67707165 vZ1. /////2/0/7 1M Gttomq- No. 789,627. Patented May 9, 1905.

mans anr CHARLES LEIVIS PULLMAN, OF \VASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THE PULLMAN AUTOMATIC VENTILATOR COMPANY, OF l/VASHINGTON, DISTRICT OF COLUMBIA, A CORPORATION OF NVES'I VIRGINIA.

VENTILATION.

SPECIFICATION forming part of Letters Patent No. 789,627, dated May 9, 1905.

Application filed January 19, 1901. Serial No. 43,937.

707mm 73/1 Z/ (10711067711: other the rear-end connection or opening Be it known that I, CHARLES LEWIS PULL- between the space to be ventilated and the out- MAN, a citizen of the United States, residing side is at the rear. To effect this, not only at l Vashington, in the District of Columbia, must there be 'iassage at the rear, but pas- 5 haveinvented certain new anduse'ful Improvesage at the front must be closed. For this ments in Ventilation; and I do hereby declare purpose I provide by preference a valve acthe following to be a full, clear, and exact detion and by the provision thereof not only scription of the invention, such as will enable may passage at the front be closed and pasothers skilled in the art to which it appersage at the rear through the aperture be open,

IO tains to make and use the same. but the device will be rendered automatic, The object is to supply fresh air, free from since with the closure by the valve at the smoke, dust, and cinders, to a railway-car, front there will be opening at the rear. street-car, cab, carriage, ship, or other closed Referring to the drawings, A designates a conveyance, or to a stationary chamber, such solid-backed hood or casing which in use will 15 as an apartment, or a mine, and rid the space have its back projecting outward. The hood of foul air. may be of any desirable contour, hipped or The invention consists, generally stated, in other, is to bridge an aperture to the space a ventilator operating in impingement by it to be ventilated, and has an end (the rear end of air, or in impingement of it by air, to cause in use) over the corresponding end of said ap- 2 passage of air between the outside and an inerture, leaving a passage. The aperture may closed space at a part of the ventilator oppo' be in a window-sash. site to or different from that of the impinge- In Figs. 2, 3, a, 5, 6, and S I show the hood ment, substantially as hereinafter described. upon a support or back plate B provided with The appurtenant drawings show some of an aperture 7/, and this support may be re- 5 many forms of embodiment of my invention. movable or not, be in one piece, or be com- Figure l is a view in perspective of a deposed of a number of removable sections for vice suitable to perform my invention when adjustment of the device to windows of difapplied to an appropriate apertured support, ferent widths. theassemblage constitutingaventilator. Fig. To close the front of the hood to passage 3 2 is a view in sectional plan exhibiting this therothrough of air, I may provide a valveC, device on such a support and showing a conas' shown in Figs. 1, 2, 3, 4, and 6, pivoted in venient shutter. Fig. 3 a view in transthe hood, the valve being preferably curved, verse section of this form of ventilator, taken as shown in Figs. 1 and 2, (which display the on the line 3 3 of Fig. .2 and looking in the preferred form of my invention,) and for in- 35 direction of the small arrow. Fig. 4 is a view creased impactsurface transversely corru in end elevation of the same. Fig. 5 is a view gated. in sectional plan of a modification. Fig. 6 is Instead of employing the centrally-pivoted a similar view of another modification. Fig. valve I may employ two flaps 11 connected by 8 5 7 is a view in perspective of another modilia rod (1/ having pivotal connection with an 4 cation, and Fig. 8 is a view in sectional plan extension (0", carried by a vane 11!, arranged "of still another modification. on the outer side of the hood, the vane being In the embodiments shown connection bepivoted at the apex of the hood and operated tween the space to be ventilated and the outby impact of air. side is at the end opposite that of impact In some instances I may, as shown in Fig.

4-5 that is to say, calling the end which in mov- 7, make the hood alone constitute at once a ing strikes the air or which when stationary valve and a hood by pivotally supporting it is struck by the air the front end and the over the aperture 1n the support, as by arms and providing slots or grooves if, in which the sides of the hood work when it is shifted by impact of air.

To operate without valve action, one end of the hood may extend down to the support, Fig. 8, and the device be arranged always to have this end that of impact.

For general action as an intake the rear end of the hood should extend one and one-fourth inches more, or somewhat less. beyond the corresponding end of the aperture; but action will sometimes alternate to that of an exhaust. To facilitate action as an exhaust, the termination should be practically with the end of the aperture or only slightly beyond this.

Figs. 2 to l display as a convenient addition to a suitable ventilator a shutter D, hinged at its lower side within the aperture, the upper side carrying a screen (Z as a guard against deposit of matter or interference with the valve. Each end of the shutter carries a flange (Z having extensions d", pivoted, as at 1]. The shutter may be operated from within the ehaml her or space to be ventilated by a knob (Z or from without by a rod or the like.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A ventilator comprising a back plate provided with an aperture, an open-ended, hipped casing carried by the back plate and being over an end wall of the aperture, and a curved valve pivoted within the casing, substantially as described.

2. A ventilator comprisinga back plate provided with an aperture, an open-ended, hipped casing carried by the back plate, and being over an end wall of the aperture, and a curved, corrugated valve arranged within, substan tially as described.

In testimony whereof I aflix my signature in the presence of two subscribing witnesses.

CHARLES LEXVIS PULLMAN.

\Vitnesses:

CHAPMAN W. FOWLER, EDMUND H. PARRY. 

